What Are the Different Types of Uterus Positions?
The uterus is located in the middle of the pelvis, between the bladder and the rectum. Its position can vary with the degree of filling or position of the bladder and rectum.
- Chinese name
- Uterine position
- Foreign name
- Uterine position
- Name
- Uterine position
- category
- Other as
- The uterus is located in the middle of the pelvis, between the bladder and the rectum. Its position can vary with the degree of filling or position of the bladder and rectum.
Overview of Uterine Location
- When standing upright, the uterus is almost parallel to the horizontal plane, the uterine base lies on the back of the bladder, and the cervix is kept above the level of the sciatic spine. The normal uterus of an adult is in a slightly forward leaning and forward bending posture. The forward leaning is an angle of forward opening between the uterine axis and the vaginal axis. The forward bending is the bending between the uterine body and the cervix.
Uterine location and uterine morphology:
- The immature uterus in adult form has a slightly flat, inverted, pear-shaped shape, which is about 8cm long, with a maximum width of about 4cm and a wall thickness of about 2cm. The uterus can be divided into three parts: the convex part above the uterine opening of the fallopian tube on both sides is called the uterine base; the thin round part at the lower end is called the cervix; the part between the bottom and the neck is called the uterine body. The cervix is divided into two parts: the part of the cervix that extends into the vagina is called the cervical vagina; the part above the vagina is called the upper part of the cervix. The part where the cervix is connected to the uterine body is slightly narrower, called the uterine gorge. During non-pregnancy, this part is not obvious and is about 1 cm long. During pregnancy, the uterine gorge gradually expands and stretches (up to 7 to 11 cm), forming the lower uterine segment. Obstetrics often perform cesarean section here.
- The narrower lumen of the uterus can be divided into upper and lower parts: the upper part is surrounded by the bottom and the body, which is called the uterine cavity, and the lower part is inside the cervix, which is called the cervical canal. The uterine cavity in the frontal position is a slightly flat triangular cavity back and forth, with the bottom facing upward, and the fallopian tube uterine opening on both sides; the tip leads down to the cervical tube. The cervical canal is prismatic, and its upper mouth is connected to the uterine cavity, and its lower mouth is called the uterine mouth, which leads to the vagina.
Uterine position fixation device:
- The normal position of the uterus is mainly maintained by uterine ligaments, pelvic ridges, urogenital ridges, and perineal central tendons. These structures can cause uterine prolapse when they are damaged or relaxed.
- (1) Wide uterine ligament:
- The broad ligament of the uterus is a double-layered peritoneal fold on both sides of the uterus, extending from the peritoneum in the front and back of the uterus to the pelvic wall. The upper edge of the broad ligament of the uterus is free and contains the fallopian tube; the lower edge is attached to the pelvic floor, which can limit the displacement of the officer to the sides.
- (B) round uterine ligament:
- The uterine round ligament is a round cord-like structure composed of smooth muscle and connective tissue. The ligament starts from the lateral edge of the uterus, before and below the uterine opening of the fallopian tube, between the two peritoneums of the broad ligament of the uterus, and runs along the pelvic wall. This ligament is the main structure that maintains the anteversion of the uterus.
- (C) the main ligament of the uterus:
- The main ligament of the uterus is composed of smooth muscle and connective tissue. It is located between the lower two layers of the broad ligament of the uterus and connects from the upper part of the cervix to the side of the pelvis.
- (D) iliac uterine ligament:
- The sacroiliac ligament is composed of smooth muscle and connective tissue, starting from the back of the upper part of the cervix and vagina, bypassing the rectum backwards and attached to the front of the sacrum. This ligament pulls the cervix backward and works with the uterine round ligament to maintain the anteversion of the uterus.